要做的事, v! n2 @/ _" K# G0 _
通过STM32自带的12位ADC模块读取8通道电压信号,并将其通过USART1发送出来
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STM32Cube的USART1配置6 l8 G# D' C2 B3 p. A
USART1总体配置
) P- D2 k4 W( z3 F& _2 OUSART1的配置如下图所示
( v# ~; R$ \. q波特率初始化为115200,后续可以再进行修改
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USART1引脚配置
$ P9 Z* R; q5 s* c8 o* v) W8 JUSART1的引脚配置如下5 Q8 ^8 J: P6 |& k# w7 }' G
3 U& G; L/ ?4 ]
PA10为USART1的RX7 U E5 U V8 Z: ?' f6 X: G
8 @7 _9 U0 s+ Q, `- O$ `PB6为USART1的TX" i* ]4 p& v5 F" v* [
- H$ ~8 _( U' P3 K# `4 }* M
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: [8 L- F$ c6 @6 g/ @: i, L' Xfputc重定向% L' c: @2 e3 A5 W* P: x
重定向完成后,在.c文件的开头或对应的.h文件中include <stdio.h>即可使用printf函数
4 k' `. l, V6 f$ n: J& o/ M: f- M A
; P6 [4 O5 ]7 w& ^+ ~
q& X/ w2 W& j/ o+ NUSART1接收+ v- W' b% A$ I( A
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重写中断服务函数HAL_UART_RxCpltCallback
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( k$ f1 h% G& b" `( ]/ c* G; u# v2 K+ t; l4 r1 z
自定义一个Clear函数, P2 S. A: F, r: \/ T
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) q2 B0 `6 I) p( ?$ Z0 l! x4 P7 Z/ S$ y9 H! B2 m. O
我们需要在几个地方extern一下,一个是usart.h一个是main.c4 |0 o, F; Z! y) e
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这里附上相关代码* J5 p5 p. a6 p) K3 l
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首先是usart.h
6 A- K3 S6 Q* u; s; i- i3 A% V9 P4 Y" F8 X, o2 Q: w
- /* USER CODE BEGIN Header */
9 x6 y/ D5 H4 T* w - /**
0 p3 l8 H. c$ ]) U9 h. F o0 o - ******************************************************************************
. }+ L( E! e2 _1 z9 Q% a7 ~8 B - * @file usart.h. L2 b, w6 b6 b. `! g8 _
- * @brief This file contains all the function prototypes for
. ]2 S. n: E7 m7 q9 E& w - * the usart.c file t9 D4 v& v3 L
- ******************************************************************************. G: P2 c: o3 q! F" V
- * @attention. R# _* B7 q5 x
- *
% R- d4 @( y) q* E5 C - * Copyright (c) 2022 STMicroelectronics.! K% B! R' k( P0 D0 ?
- * All rights reserved.
H/ ?5 d. Z' f3 w) u7 A! m - *
. k J: [) ]. O% W4 P; l - * This software is licensed under terms that can be found in the LICENSE file
5 d- V# Z, ^1 u! M, L - * in the root directory of this software component.. O. H1 n$ j' h9 Z1 ]% g
- * If no LICENSE file comes with this software, it is provided AS-IS.
% U, `5 d0 y8 s - *
( q$ L& f5 H/ j3 V- Z - ******************************************************************************' ^8 _' R Y. [' {
- */) F- ]; t9 L( X; ~
- /* USER CODE END Header */& ?( H- V8 A1 o* ?+ d
- /* Define to prevent recursive inclusion -------------------------------------*/( D% z: s4 j( p* H
- #ifndef __USART_H__
& j! p2 Q2 |! s5 e) X/ | - #define __USART_H__9 ~3 u+ C% N! M/ b" O
-
3 a1 f, Q* ~3 O. B; e) ~' f: A1 d: T - #ifdef __cplusplus( I$ e6 z8 v: |
- extern "C" {
' L3 s" Y8 H/ h3 U+ ~ - #endif8 C9 t; r' X, W+ w' X2 l( @
-
+ _$ v# w& r; h - /* Includes ------------------------------------------------------------------*/2 S2 A! m6 V, R' s: t; N
- #include "main.h"9 Z. x3 L# o# T$ B" E* P
- : x' u2 D8 @& w/ ?# y' ?( h) x% A: @
- /* USER CODE BEGIN Includes */& u0 z/ \; D: m4 d, |
- #define USART_REC_LEN 200 //定义最大接收字节数 2007 U7 D7 x4 Z( x! w
- " J6 G1 k9 ~+ d e
- extern uint8_t USART_RECEIVE_CHAR;# x J" Y0 D/ L( D0 V0 n3 Y
- extern uint8_t USART_RECEIVECOMPLETED;/ A6 q* ]/ Y" r" S
- extern uint8_t USART_COUNT;
# R8 ^# |. [2 S$ }( O; m - extern uint8_t USART_RX_BUF[USART_REC_LEN];- T% ?4 ~' U& n l x/ C% g2 ?! F
- /* USER CODE END Includes */
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- a6 ~* ?8 k% ?1 @ - extern UART_HandleTypeDef huart1;& k7 a, a- e# F4 M& P% S! e3 \
- o# P/ |$ x2 V( E4 U
- /* USER CODE BEGIN Private defines */
7 Z( ^3 G) l8 q k9 N" m3 L! N -
7 K: d: c: t8 z; Q0 O& d - /* USER CODE END Private defines */) o) e' n. F3 L" B+ Q6 ^
- / W+ Y8 w" C: I. {! }$ {, [
- void MX_USART1_UART_Init(void);
. w3 X5 s& n8 l% f -
" _2 t4 S. `9 J( D& _ - /* USER CODE BEGIN Prototypes */
* b8 {1 e" w) a$ @/ x! c - void ClearUSARTReceiveBuffer(void);
# B5 u9 x! F: Z7 ?+ J - /* USER CODE END Prototypes */( s; b, x' m1 H2 a9 S, Q. K3 J( y* V
-
4 ]& s+ s- a! \: U - #ifdef __cplusplus# f& E" L o. Q& l
- }) S' X, P2 R2 r1 o
- #endif0 e4 ^+ |; Z [! f
-
- h7 {# m% ?% d5 z# |5 | - #endif /* __USART_H__ */
% r) `. `# n& Y& L -
复制代码
( B7 c' y6 {/ o, X' zusart.c
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+ y0 J5 i4 \) W9 @9 L* l- /* USER CODE BEGIN Header */4 W# A# x: T% p5 |+ G
- /**; X: _ A' u$ |, V1 U8 }
- ******************************************************************************6 x2 Z4 C+ H0 i) K
- * @file usart.c, G* o( O5 K, I, r/ {: @. c' k& S
- * @brief This file provides code for the configuration i6 m* c' r& {# X
- * of the USART instances.
* I" |2 r0 W& N- D# z# Z - ******************************************************************************
9 K) ^. ~) x/ v$ L6 o& q( @0 Z+ { - * @attention
$ {( u6 `7 n8 o8 M - *$ R+ E2 z8 q# _. e# {$ p# f* k) a
- * Copyright (c) 2022 STMicroelectronics.
4 m$ B* O! f1 c/ {- { - * All rights reserved. l$ b0 X) s$ B' g" k
- *
) d- Q8 o6 H# [ - * This software is licensed under terms that can be found in the LICENSE file, y' F* B" B/ t- \' w f# X. l3 S" b
- * in the root directory of this software component.
' D7 S2 b( u6 z1 [, r1 j3 A: y - * If no LICENSE file comes with this software, it is provided AS-IS.
% S7 E, T" M& \% d" I; U - *
0 _5 V0 [6 L9 D7 `* p% D! j - ******************************************************************************8 N3 Y" w3 ]+ c& w: x& D
- */
% D1 Z( @4 j" p1 h - /* USER CODE END Header */, I+ M+ a+ D$ Q9 s& n0 k/ s
- /* Includes ------------------------------------------------------------------*/
@2 A) i% X1 o0 m - #include "usart.h"
+ g3 T4 u3 o6 C7 o -
* j6 N) b8 p( k7 D% R1 U4 I - /* USER CODE BEGIN 0 */
. p- Y0 M. I/ r [- d - #include "stdio.h"/ x1 x e$ P1 o% a- I" S: p
- #include <string.h>) c# B7 m" t) g a$ _5 S4 U
- + s$ E* d3 l X) f- {: V
- uint8_t USART_RECEIVE_CHAR = 0;
7 G0 `4 x% R b# [) ] - uint8_t USART_RECEIVECOMPLETED = 0;// 1 Completed 0 Incompleted
/ Y/ G) B) z* q& _9 i - uint8_t USART_COUNT = 0; // 接收的字符数+ b4 [) z7 A- B/ O* O( v0 u
- uint8_t USART_RX_BUF[USART_REC_LEN] = {0};' [( t9 e, C: u/ c. W
- /* USER CODE END 0 */3 i) N5 s2 U$ h$ n* O
-
5 t4 S& V! \3 K' u5 x - UART_HandleTypeDef huart1;3 F: k3 ~6 n1 p
-
/ y9 f( c/ p5 O - /* USART1 init function */6 i! c& X& O3 S1 U. P$ G" ]
-
* p- J9 Y3 f& r7 ?8 z& J) r - void MX_USART1_UART_Init(void)
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-
7 E3 E" w0 W8 E U - /* USER CODE BEGIN USART1_Init 0 */
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- /* USER CODE END USART1_Init 0 */
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- /* USER CODE BEGIN USART1_Init 1 */" ^2 X6 q k; t- z
- & `( x/ Q- x- B0 e$ V: k7 A# h6 i: I
- /* USER CODE END USART1_Init 1 */8 Z% m! p% D1 ?! T/ ]
- huart1.Instance = USART1;
+ m6 e) W, Z6 {$ F( H; O - huart1.Init.BaudRate = 115200;
/ s7 ~! q, ], Y - huart1.Init.WordLength = UART_WORDLENGTH_8B;
- s& i0 j$ j, ]: C' [ - huart1.Init.StopBits = UART_STOPBITS_1;
' M+ v8 f4 A" \ - huart1.Init.Parity = UART_PARITY_NONE;# p' l3 h, c _% O( P& A$ @0 I
- huart1.Init.Mode = UART_MODE_TX_RX;$ B. V: M8 \% C! K% n9 v, [
- huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
- Z F7 i/ [2 ]# z9 ~- C% e - huart1.Init.OverSampling = UART_OVERSAMPLING_16;/ h. L, t; W0 A4 y& J
- huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
- ~. t4 z. j6 @6 N6 ^ - huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;& K+ Z/ V2 C3 X; v) Z
- if (HAL_UART_Init(&huart1) != HAL_OK): g+ ^& z' B2 C& a
- {0 \* _, R. _* z L
- Error_Handler();
- i' \- g7 i) s; e' Z( l# ^ - }! s& f3 Q( \+ G% K
- /* USER CODE BEGIN USART1_Init 2 *// u( x" k0 c# P$ W
- 5 H: q, B/ o* ] N. P7 ^9 ~
- /* USER CODE END USART1_Init 2 */
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- ( @# B5 M. d: a$ u+ Y; E
- void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
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- GPIO_InitTypeDef GPIO_InitStruct = {0};3 x$ _# F9 m0 r6 |5 m
- RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};0 U" V7 A; J- \& q9 h0 ^
- if(uartHandle->Instance==USART1)
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+ F, D7 R" x6 {4 H2 I% D0 u' B - /* USER CODE BEGIN USART1_MspInit 0 */
6 f) g9 m |. c, Q- @ -
( P+ s( K; U" g# | ?3 Q - /* USER CODE END USART1_MspInit 0 */
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- /** Initializes the peripherals clock% W; n0 J; F& u+ k& B$ ^2 v
- */8 K# T3 y8 v: a' a, W# x" _
- PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
" v2 U" A, C; }6 u; P" w9 R; [ - PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
/ P' Y& }) U+ _! ?4 h- M! H - if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
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- Error_Handler();
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# B c1 Z/ J# b" n2 Q0 s' G - /* USART1 clock enable */
/ i; ?- b, \% Y. |$ { - __HAL_RCC_USART1_CLK_ENABLE();
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: x; p" P- `7 M+ W) l9 k8 ^ - __HAL_RCC_GPIOA_CLK_ENABLE();7 t+ g. F' v/ w4 _3 n+ A' p+ |+ [ s5 q
- __HAL_RCC_GPIOB_CLK_ENABLE();# ], t$ }) B! L) `# b& d2 R
- /**USART1 GPIO Configuration) [7 C( M7 O# m3 h) L
- PA10 ------> USART1_RX* s. R2 K1 g' z
- PB6 ------> USART1_TX; D% F" [& W4 p \2 R& y
- */
7 _. p! q0 S" Z8 s - GPIO_InitStruct.Pin = GPIO_PIN_10;
% M, Z. y& {4 ~+ H% N# L - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;( d: i& M4 G$ y4 N7 @+ W/ X4 Z+ r
- GPIO_InitStruct.Pull = GPIO_NOPULL;: \: X, V ]1 m9 ~: [7 m/ k
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;9 v1 ^; L3 c8 Y0 W" ^0 Z
- GPIO_InitStruct.Alternate = GPIO_AF7_USART1;/ O6 W/ L! [' a" ^3 r
- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
! A3 y8 c' i2 S: T5 M: A - 2 s1 B$ ]8 M" Z
- GPIO_InitStruct.Pin = GPIO_PIN_6;0 G8 F2 k0 x# e5 T6 W
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;. U! y' B8 \) }: c: \' [
- GPIO_InitStruct.Pull = GPIO_NOPULL;$ |6 y/ j9 w6 O1 B- ~9 n5 C
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
0 a ~6 n$ q, n - GPIO_InitStruct.Alternate = GPIO_AF7_USART1;$ J; P- X& X/ r7 p. Q0 [1 O: b% V
- HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+ @. d: {8 c: M$ j# w - * c9 Y# |% U- N0 n* ]+ X
- /* USART1 interrupt Init */- ~' c8 @" k+ [* p/ A; p
- HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
& l6 t3 ]; S4 q& ?4 ~* h - HAL_NVIC_EnableIRQ(USART1_IRQn);
+ w" t, ~% ]7 R5 K0 _ u - /* USER CODE BEGIN USART1_MspInit 1 */ ~$ G4 X( s" ?, Z6 J
-
; ~% P# @% ]3 M - /* USER CODE END USART1_MspInit 1 */5 v' o7 j& b' p( }% f3 W' y
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- }1 x8 e( l9 m* G3 b
- 3 ~7 R' q6 n- ]1 F2 X" w' R5 e
- void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)' ]1 }6 Z& E9 d0 l! r
- {
- U; N0 W, f( O) y. J8 o- j -
6 F: J& x9 P6 P" B$ c4 T( O2 G2 Z - if(uartHandle->Instance==USART1)
( r* ?1 F5 u3 h* F3 k- H$ X - {
/ p/ x {2 W# f - /* USER CODE BEGIN USART1_MspDeInit 0 */
9 J2 K" d& f4 [5 [) o0 ^ - . _9 C" V4 S! m8 ^
- /* USER CODE END USART1_MspDeInit 0 */7 ?. P' [" L2 A: f8 ~: |
- /* Peripheral clock disable */
8 ^9 }/ b/ l, a4 s' l/ F. B - __HAL_RCC_USART1_CLK_DISABLE();: D. e; e, j4 V- y8 x0 x+ ?
-
8 W t+ n8 T5 a5 R) o; R& n - /**USART1 GPIO Configuration/ q( u5 \4 {( F5 h# H
- PA10 ------> USART1_RX( G, A5 m- c4 F: }
- PB6 ------> USART1_TX
) w7 I+ ]" s( |( C" K - */1 e. s+ N9 F: K' T
- HAL_GPIO_DeInit(GPIOA, GPIO_PIN_10);
8 h. g8 _- K5 b( g6 z -
! }. v6 X [# o9 O: B( f4 T M - HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6);
; x9 R/ ]2 {! o5 ^) c' ] - 9 A% ^! q3 U8 z9 u4 D& T( }
- /* USART1 interrupt Deinit */2 d. G& u) x1 D* i6 q+ @8 l
- HAL_NVIC_DisableIRQ(USART1_IRQn);
7 S F' X X J+ l& Q - /* USER CODE BEGIN USART1_MspDeInit 1 */
8 ?/ b7 T$ J& Z C/ L2 M$ y -
" w2 V/ ~7 t+ a6 o( R - /* USER CODE END USART1_MspDeInit 1 */; X2 Q/ O+ C9 b7 k* m
- }
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- . V8 R3 k6 z: b: X& w
- /* USER CODE BEGIN 1 */
/ u K( _* K' B$ n - // 重定向函数1
# v1 G ^2 h! d6 O$ I - ' X; q2 @1 @, f7 X( B
- // 注意这里重定向函数的写法
% L& B6 `9 p: W - int fputc(int ch,FILE *f)1 y/ _8 P I& G! R, X
- {4 R4 m1 d; o; q- r7 P
- // 另一种重定向函数写法
/ j# S2 w. R" r8 ~* a _. q" w - // uint8_t temp[1]={ch};
" s, a& R$ f4 z7 j) Q; ] - // HAL_UART_Transmit(&huart1,(uint8_t*)&ch,1,0xFFFF); //UartHandle是串口的句柄7 f7 {' f M0 I/ _# _6 L. w; y! ?
- // return ch;: u( a) N5 d [# I* r
- 8 M) @7 _ `" s) k
- // 可行的重定向函数写法9 d6 g$ I' s/ T I/ u; J
- while(!(USART1->ISR & (1<<7)));
+ s5 v; L. _( y& L8 E, C d# p - # V' J+ m' V3 v) N1 D
- USART1->TDR = ch;7 N, w# {4 u6 {8 G/ z
- 7 |. r6 L0 ^' s% J1 f
- return ch;
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+ ], K, l. j4 }8 o. }. @; N! z -
- U" j6 T8 ~$ o& k9 i! m9 a ^7 \ - // 重写串口中断服务函数
8 k7 n3 j- C3 a - void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){' ~1 ^! g$ ^$ k" w; P4 U6 P
- // 每当串口接收一个字符就进入这个HAL_UART_RxCpltCallback函数
, y. V0 i( G4 k( @ - if(USART_COUNT >= 200){2 Y- ~- U$ h6 T2 f( d3 v/ j# L
- // 判断接收的字符串长度是否超过了最大缓冲区长度
5 J% x2 R) {* B7 \1 D. O - printf("Overflow");// 若超出最大长度则输出Overflow
6 y# E& @9 {( S2 X+ I0 {3 H - memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF));
$ a; `( N; l" z- s, O - USART_COUNT = 0;
) _! U/ J2 ^: q0 H. i' h - }else{
: r8 f. q$ m3 B$ J9 t1 u) [2 k3 X& V - USART_RX_BUF[USART_COUNT] = USART_RECEIVE_CHAR;// 将接收到的依次字符存放到USART_RX_BUF! V! ?) e3 @$ m* @
- USART_COUNT++;// Buffer中的指针后移
) }: d, b7 o' m7 b- L4 Q0 g1 Y - if((USART_RX_BUF[USART_COUNT-1]=='\n') && (USART_RX_BUF[USART_COUNT-2]=='\r')){// 判断是否读到了\r\n
/ B4 O- l# Q. @, V. p - // 若已经读到了\r\n则Buffer中的数据即用户发送的数据且以\r\n结尾$ J$ b; ~/ T- j3 Z7 U4 K$ [5 }2 B
- // printf("Received Completed");1 p2 y$ _ r. L% b6 i
- USART_RECEIVECOMPLETED = 1;/ E4 \) y6 f2 W& I
- // HAL_UART_Transmit(huart,USART_RX_BUF,sizeof(USART_RX_BUF),100); // 将Buffer中的内容传回给用户
* E2 W- Y! b) D - // memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF)); // 清空Buffer用于存放下一个用户发送的字符串
9 w3 n& h5 P2 A: Y' j/ z, x! W - // memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF));
& } r+ O2 z2 e4 ^3 B - // USART_COUNT = 0;// Buffer中的指针复位
* O S5 S: y4 [, {& ]9 z) Q - // USART_COUNT = 0;
8 D5 O) B- |2 v5 I& o1 d1 }) z3 T8 P0 h - }
4 g+ W; L) I- T; e3 U8 i4 V% ~. w& | - }! }1 }' j m. k/ ~( j j E. n7 f
- HAL_UART_Receive_IT(&huart1,&USART_RECEIVE_CHAR,1);// 再次打开串口中断否则串口只能接收一个char字符
* O! N$ L; h5 { - }
4 S/ `# z+ }$ K0 x - % ~0 D# r* b4 [
- void ClearUSARTReceiveBuffer(void){0 I, a" n% p+ x% W% n6 b2 @
- % q) i* _9 I# w5 t( b" V
- USART_COUNT = 0;// Buffer中的指针复位
* m8 ^# g8 g. F' Q3 Y - USART_RECEIVECOMPLETED = 0; // 清除接收完成标志
8 q* U/ K- K& u7 a - memset(USART_RX_BUF,'\0',sizeof(USART_RX_BUF)); // 清空Buffer用于存放下一个用户发送的字符串
& h3 R0 R) N+ Z8 w5 Y. R - }( m/ K) T2 p: t# ^ q
- 1 @3 ]$ t6 a) i+ V% L4 S; |
- /* USER CODE END 1 */
复制代码
6 |9 p; `7 `; b3 ?7 V+ `main.c' ]" I' R2 d7 n; r |% q
$ a% `& l) s4 n! j, k# n
- /* USER CODE BEGIN Header */
( g# v' \3 p3 Z6 u: D& U - /**
& C0 x% n1 P) q8 }7 @( |2 z* F - ******************************************************************************' f: R3 s `- i1 X1 ?' U$ a
- * @file : main.c
# T# j: d; v/ N9 m9 b( B - * @brief : Main program body# t" o* {/ ]. v
- * @author : Lihang Zhu
$ f' d ]3 H/ \/ P/ V" I; m - ******************************************************************************
( f+ b. V9 A1 R$ Q: _. V - * @attention6 u. z" S- |) f+ F
- *8 H$ P& C# E: w3 j/ V2 \' N
- * Copyright (c) 2022 STMicroelectronics.
3 ^4 m1 O0 o* U2 Z' A( Q0 ` - * All rights reserved.
; D7 x! m! f' s' O - *8 {4 B" z$ O& T5 U( [
- * This software is licensed under terms that can be found in the LICENSE file
9 L3 i% V: P7 w& ^! C: V - * in the root directory of this software component.- Y; @5 |( C) K4 R2 ^
- * If no LICENSE file comes with this software, it is provided AS-IS.
* L% q$ ]. u4 ?4 N, s, c# h - *! z! `* ~. w2 x
- ****************************************************************************** N$ K: i% A3 E; q
- */
& [6 x0 o+ f* c# w& q; `) z0 M - /* USER CODE END Header */5 F: g* k+ V x' h o7 C0 \
- /* Includes ------------------------------------------------------------------*/; T( o, ~9 i* T, g+ R7 E% i
- #include "main.h"
1 u4 I! S7 _: F _% w( N - #include "adc.h"
+ ], g8 d1 n3 U* k, | - #include "dac.h") }2 f: X' W$ K! U5 y0 x
- #include "dma.h"
1 y2 ]3 Y/ h' H" M8 c0 i6 f - #include "tim.h"9 T9 h! l: X; x5 L3 u' k5 s
- #include "usart.h") z' k9 K# A& v- d; m
- #include "gpio.h"
5 V5 f+ D) p r" E3 U- u - #include <stdio.h>
5 T$ v6 E. `; k" | - #include "cv.h"
9 K) O/ S Y0 r1 a, T - /* Private includes ----------------------------------------------------------*/8 ^, ?: L% L/ I# b4 C
- /* USER CODE BEGIN Includes */- _) Y7 N. N d4 W
- /*PB6---UART1_TX
* Z3 O5 H4 e5 `4 `- d - PA10---UART1_RX
7 A$ l6 t4 q H: n# m. f -
4 s$ P' u: R1 z! C- f - PA0---ADC1_IN57 D+ ]: b7 G- K: _5 s4 n, B8 ~
- PA1---ADC1_IN6
% S, |* Q& o T - PA2---ADC1_IN7" v; }* [ E8 K4 \: C* F4 d
- PA3---ADC1_IN8
: _1 I+ N; \( [5 D- ~* x - PA6---ADC1_IN11
' ^0 P3 L# }3 T$ O - PA7---ADC1_IN12
+ g% d) W, @+ A& C6 O: f - PB0---ADC1_IN15. @' D" |, b/ f# F& ?) U) b
- PB0---ADC1_IN16
7 r; b6 q2 ~- @4 @* z -
v+ J' `! O# N" O$ y$ P* { - PA4---DAC1_OUT1 程序输出 2048/4096*3.3= 1.65
2 R; @) J$ o# H& Y/ V6 j - PA5---DAC1_OUT26 s4 d) r' [5 y! I
-
7 g( }+ T: N8 ~% l0 X4 g4 M* g - PA15 LED灯进行翻转 亮灭7 T, n9 B$ T; U& ]
- *// o/ k3 `$ y1 w
- /* USER CODE END Includes */
0 \2 o! x. f/ D, x) K- e& p1 C; b - 1 a) d7 o+ A* g
- /* Private typedef -----------------------------------------------------------*/
4 ]* H) v+ `+ t7 g- `2 f - /* USER CODE BEGIN PTD *// W3 |6 I( d; l2 P8 S
-
. l$ {+ z% a5 _$ V) N) D - // ADC Buffer 16bit0 D0 P u! ]$ h" \
- volatile uint16_t ADC_Value[8];//存储数组
- T' |: N6 M& @6 y - float ADC_RESULT = 0;
6 ^% U A4 I; @3 i/ G p3 \ - // USART Related Content
4 b1 @ R! ?" [4 S* Z# S6 E- E& ] - // @author : Lihang Zhu. r, F8 D G$ }* }9 @
- extern uint8_t USART_RECEIVE_CHAR;
' v* z. ?4 N9 @. {& ~ - extern uint8_t USART_RECEIVECOMPLETED;+ \, f1 e6 Y, P& a' {
- extern uint8_t USART_COUNT;. q4 t; j: d" j* }7 ~
- extern uint8_t USART_RX_BUF[USART_REC_LEN];( i; {% z9 ]$ ^2 E
- /* USER CODE END PTD */
+ b3 ]7 m+ X4 Z -
, G* r3 h4 L" h - /* Private define ------------------------------------------------------------*/ e0 k$ b. Q( B- Q5 A! l
- /* USER CODE BEGIN PD */
8 u/ D; p* V" b4 Y# n) @, m - /* USER CODE END PD */: P' }) |* |2 Y
-
' b! I, ]2 c! F3 b3 x - /* Private macro -------------------------------------------------------------*/
: B5 o; W- y& H2 S - /* USER CODE BEGIN PM */9 ]: k$ R$ d. m' s; F" Z
- 6 t: F* O( F- o8 K& a
- /* USER CODE END PM */
' z5 G2 M0 w% C4 j: J -
) l- x1 D: n C% U. o5 r. q - /* Private variables ---------------------------------------------------------*/" {, [$ X8 W+ Y4 [) R
- 3 N! ]9 T/ ]7 J
- /* USER CODE BEGIN PV */# S& v+ M6 }+ T) v" y, N
-
" e( e0 Q, A$ I6 F. Q& D1 Q - /* USER CODE END PV */
8 }, F( {# I0 f0 K+ P) d -
7 V O, K1 i, ]0 c% e - /* Private function prototypes -----------------------------------------------*/# H! O- K' L% ^! J9 q7 V
- void SystemClock_Config(void);
5 X3 J( n( m- ~/ ]5 ^" t - /* USER CODE BEGIN PFP */3 L8 \, C: L) F% M! Q
-
3 ~' ^0 [& U3 e) u - /* USER CODE END PFP */
}1 }$ g" p7 j) R [3 v, s# { -
F3 Q# a& t s+ I. {; } - /* Private user code ---------------------------------------------------------*/4 G; c1 {' g z! f. [* P: I1 _3 l
- /* USER CODE BEGIN 0 */# w8 x8 M( p8 s {
- $ v7 S; A$ y8 w- k$ L9 Z
- /* USER CODE END 0 */5 W o# X! Z& N: d. n$ Z- S
-
! s" Z7 G+ y5 ` - /**
9 r1 u) X8 F3 V" v - * @brief The application entry point.
$ Q* E0 O& y4 D0 f# P% G3 @ - * @retval int2 F, _+ C5 |, M4 X
- */" L# d3 F5 f) f, a6 C! g' l
- int main(void)8 w/ x$ Y, t; _: ~1 J
- {
9 t# }8 _" B0 @# ~. Z" @' `2 j - /* USER CODE BEGIN 1 */" K. V. A' P: _: Y3 P3 i& s; G
-
. O8 ^! J3 K; X - /* USER CODE END 1 */
/ R8 J' V) t4 J# w! J - ! l: G) ~$ p7 p2 }- |: J( b1 s
- /* MCU Configuration--------------------------------------------------------*/
2 b) v( {5 l1 E -
% Y0 D: C0 x) f5 T h+ S: Y - /* Reset of all peripherals, Initializes the Flash interface and the Systick. */) p& K. x/ |1 H! R. {: [1 b* s
- HAL_Init();
: T* v! |/ _3 D/ |: u - 1 t# n) R0 {8 I8 a+ q/ f2 I
- /* USER CODE BEGIN Init */
& T/ C. J3 e5 e- }( q/ e" c0 e -
, O/ U, N/ W5 V) V# C5 J - /* USER CODE END Init */
9 L6 s+ R% t5 R# e) O - 1 k; H4 R5 u: @# N
- /* Configure the system clock */& ^$ C% |' ~) ^- j" w( {4 U
- SystemClock_Config();
% v* l! W4 o1 |* }; v - $ F% V. b9 @! o# m! ]
- /* USER CODE BEGIN SysInit */
$ `" e% ?; G( _) O( b' a& L, f# y) \4 J -
) Y4 v' F. Z# Y+ }/ A$ I+ Z - /* USER CODE END SysInit */1 V" T: c: H2 M2 q" `9 z
-
) f' C4 A# X9 O1 P" R+ O5 u - /* Initialize all configured peripherals */; S0 U8 v2 g0 s4 [+ b+ _9 j5 ^! u
- MX_GPIO_Init();1 M: {9 H8 G+ Y5 _1 M! V% m# v
- MX_DMA_Init();
, O' R1 }8 W" u% J8 o7 J - MX_ADC1_Init();
8 w F! P3 W- V# e - MX_TIM6_Init();
% W# O# N$ p! w) K - MX_USART1_UART_Init(); Z3 H. p8 O3 U0 t0 j* M, w
- MX_DAC1_Init();
# [: I/ t3 p% q - /* USER CODE BEGIN 2 */
' s$ \) p) C# _& g& `7 f8 \ - HAL_TIM_Base_Start_IT(&htim6);) F- d/ R3 ]* d W
-
0 q4 \1 _& L. n+ F& ?' \( D - HAL_GPIO_WritePin(LED_Flsh_GPIO_Port, LED_Flsh_Pin, GPIO_PIN_RESET);* I5 \+ X* D' j' M t5 s' h) e2 S4 Z
-
; e0 o0 S9 x7 B# Q2 |( Z6 F2 F4 }4 D - HAL_ADCEx_Calibration_Start(&hadc1,ADC_SINGLE_ENDED); //AD校准
1 S1 P! U1 O) u# P9 m - HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&ADC_Value,8);// 强制转换为uint32_t
. E7 [+ V( ^" W% Z; R2 i9 H -
7 o6 h- ^1 {. m; G7 F1 V -
' t+ F3 d- _) q' H3 o8 d# p - Dac1_Set_Vol(1200); // PA4& }$ J2 t1 y) {
- 4 _1 ` j# c+ E' p
- /* USER CODE END 2 */, d! A) N& m+ q$ v) ?
- % W ~% \3 V6 d/ J! t
- /* Infinite loop */
( g- {4 y2 p" Z# O, c - /* USER CODE BEGIN WHILE */ B* O/ o7 \8 x
- HAL_UART_Receive_IT(&huart1,&USART_RECEIVE_CHAR,1); //开启第一次中断- p `1 X1 j+ \5 \6 @& F: z
- + _: g' I# k& q( H) ?: L; s! g# R
- while (1)
/ U% K1 k: V' L - {& Q( ]2 U) b2 g; Q) w
- /* USER CODE END WHILE */5 N7 ]. L4 s) D& }# l# K1 I2 H' t
- // ADC_RESULT = 3300000.0/4096.0*ADC_Value[0]/1000.0; printf("%f \r\n",ADC_RESULT);1 x" \% c2 e& r O! R
- // HAL_Delay(300);2 a( i# V( _8 v
- /* USER CODE BEGIN 3 */6 m7 Z+ M7 n$ p5 q0 b: m5 G
- // printf("Hello");
- z5 v, G, A9 {- N; C -
2 _- ], G* N! X- d! Q6 P( G9 e - 0 h+ n' K k$ d" `/ }: _
- // int i = 200;% |% y& V! c+ Q5 m8 w- L' ?6 s
- // if(i>=0){1 F1 b( C. i( ~0 p5 P n7 i4 k% ]
- // CV_setting1();
4 Y/ m+ Q7 L4 W6 ]( {" C - // i--;( T- J4 Z/ Q3 N. `- Q6 |* g
- // }/ P' o" n; X, }# t
- 8 z! n; W' b7 B! w% Z
- }
+ k2 Z4 y. \ ]# j8 x6 _/ r+ T - /* USER CODE END 3 */
7 d- ]0 O. u. h( L3 D1 @ r' _ - }/ `6 H9 w4 m& a
- 6 p9 Y4 q4 x' Y; S3 c; [, |
- /**# \1 F, h" z9 E% {% x2 n; D% d0 w2 @& [
- * @brief System Clock Configuration
5 t8 o3 W. Q( n( r* T - * @retval None7 E4 |2 _ [- |6 T$ u! z+ [- ]; P
- */
$ |. u& ^5 _/ O X. B - void SystemClock_Config(void)
3 J) ]: j7 h) W - {+ |2 a5 Y, X# a% Z' j
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};" D" q' x9 M; z4 \ V* k
- RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
8 E; `" X# V! u" z% K Y -
3 `% r. f$ K+ R2 g& w - /** Configure the main internal regulator output voltage
% a0 p" l' z4 ?$ g8 ?( A - */
+ C9 ^: y0 c; ?' m. U. L - if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
3 j$ P! F" d9 s - {" _$ b% R4 S0 M) i
- Error_Handler();- X1 Z& p& f% v; q' a
- }
$ M" A. i1 H! X2 A) C4 e" U) R - ' b: @/ z! V) E7 N/ S
- /** Initializes the RCC Oscillators according to the specified parameters
: h' l, t- [& R, c - * in the RCC_OscInitTypeDef structure.
) q+ D8 J+ K+ l; g0 s/ F* p# J - */
" m& n0 y1 i1 [: V - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
% D# _' c9 E$ k+ e2 G4 b1 |2 O* ~7 V - RCC_OscInitStruct.MSIState = RCC_MSI_ON;
4 m" e; V8 q) H `* K2 Q9 [4 e: V - RCC_OscInitStruct.MSICalibrationValue = 0;+ U* h" q6 D2 L
- RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
! z) J( n! Q ~ - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;2 L. L6 [+ [! c0 D6 b
- RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
" N% S& C( f! R/ f' [5 W/ Q - RCC_OscInitStruct.PLL.PLLM = 1;
: A2 a- q/ k7 L) L& N R - RCC_OscInitStruct.PLL.PLLN = 40;
8 _9 G* \3 }" k& { - RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
+ T8 ?4 X2 L; k, w6 M1 T- l - RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;) |! m+ `; q7 T8 y9 Q: Y/ q% c
- RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;% L- G# E# B- v0 n+ F
- if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)3 ~2 c3 o! j& `4 ~
- {, A# g$ k3 W p7 Q5 `
- Error_Handler();: G* g a' h# F2 h
- }$ t2 Y; t7 q2 ^- Q3 _6 A. |
-
( d3 c! G8 z3 |; o% n: W1 O1 x3 T - /** Initializes the CPU, AHB and APB buses clocks
3 f2 F( E. _+ ~9 P W, L- \ \, m0 L - */
9 t& [4 \1 |$ \: K1 ?) j6 T - RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK. T: a: a- ^0 \
- |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
+ h! D& k+ n/ Q1 Z, G5 J - RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
7 f4 o* h" J: x- |% A7 Q - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
{6 G; J+ ?6 v& a& X% a - RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
, j7 T( y0 `) i$ S% }+ W - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;* q: K+ N9 b0 h' F* V
-
; h* V+ X' N/ C! c3 o3 ~% J6 M - if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
; j* p+ o7 `& }( I - {
0 T$ u( |( k6 m1 x - Error_Handler();
8 ^2 J7 \3 Z" F. x - }
/ m7 K; T, n2 p! P; t. U% e4 D - }3 j6 P9 y a( T
- # L" k2 T& r* S( T4 A+ K6 Q
- /* USER CODE BEGIN 4 */7 ?+ O4 @. g( B; P
- 3 d e+ ^+ s |/ m; g
- /* USER CODE END 4 */
. n! A J" w6 p9 U! Y -
! E6 {% a6 j1 Z - /**% {* K9 p$ i; Z) _* R0 ~! p
- * @brief This function is executed in case of error occurrence.
& w2 j- d8 a( B) _3 O) [ - * @retval None
7 G& F+ [! y8 w% ~, A6 i5 j& v - */
1 q8 I3 T+ S$ l& H* G - void Error_Handler(void)
: w2 \9 J- n- W8 D0 u - {; }7 r+ h' {' r3 s9 G4 g6 N
- /* USER CODE BEGIN Error_Handler_Debug */
0 o O/ q: S( S; S - /* User can add his own implementation to report the HAL error return state */6 F' P7 I) t- u/ o5 @1 G
- __disable_irq();
, G- y! o; M4 S - while (1)
* J; J$ F0 J9 F; i5 Q1 {5 {# H - {: V$ m: R: n$ @- r- X
- }
. G# _7 T- s) V( A - /* USER CODE END Error_Handler_Debug */
) @# r% Q q* `& U# {1 h - }) X' ~/ o' A& x4 B7 v
-
" k, Q' D+ Z/ f& T4 u: Q" ]& w) o - #ifdef USE_FULL_ASSERT6 D+ l2 |! F* ~1 g/ G
- /**
% Y; G7 }) {6 `& B# l8 d - * @brief Reports the name of the source file and the source line number
# {9 r0 c1 h; n! w( M' v - * where the assert_param error has occurred.
' t' P: X4 I8 N/ T5 N - * @param file: pointer to the source file name: i$ r$ D& A; h4 n# c
- * @param line: assert_param error line source number9 S, d3 S4 t' B4 o4 [
- * @retval None! v6 }. I9 s/ y" ]
- */0 Q: {$ `+ l; U' N! t1 f7 e
- void assert_failed(uint8_t *file, uint32_t line), x# R: D2 r- }5 h `. n' M) k* c
- {
' V* L' d5 L( q$ T7 q - /* USER CODE BEGIN 6 */
" ~! g+ d$ @: R+ K - /* User can add his own implementation to report the file name and line number,
* k6 \" H; G5 c( ~7 q. B - ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
1 L; |6 b3 N. f h5 Y2 ?5 l - /* USER CODE END 6 */
4 ]; }* J$ z q f - }* g+ G8 [' r/ V7 C: B" _
- #endif /* USE_FULL_ASSERT */
复制代码
) J; |$ ~$ h/ }& g3 Z- j使用USART中断接收数据,记得要在while前开启USART中断
" J/ a2 o0 j5 c* r4 i# W. l
7 O: ^9 s1 T( i- ^, ?
' Y! W- T# _7 @' L7 P$ k4 U/ ~; B9 C
7 m/ M2 _# P6 f
) \7 c& D6 o8 |' t0 W
此外,这里也要再次开启中断# L& \2 x U) ` s. c9 Z) O
2 m4 U& _4 K& ~. E8 n' _% E# m
: a9 `6 Q! n1 X
3 }$ r, V3 s7 v6 ~5 K2 h- C$ F; o( O8 i2 e7 j% ?7 k! L* d& t1 a
注意:每当串口接收一个字符就进入这个HAL_UART_RxCpltCallback函数,我们将将接收到的依次字符按照收到的顺序从低到高存放到USART_RX_BUF中
6 V9 H8 Z% o& ~$ e3 n4 @* ~7 K$ }. D6 z* t
我们可以通过USART_RECEIVECOMPLETED判断USART1是否读取到了完整的数据
) L6 Y; u% `. R* I# G$ Y
, G: m1 A6 @" p7 t8 Z0 k读取到的数据存放在USART_RX_BUF中
, g& |7 I- U) }1 M F. R
' u) Y- j' p& [* g& h! B: A) [2 t/ o1 W8 s7 q
STM32Cube的时钟配置
+ N6 V& J# I: Z3 N) y配置时钟信号为80 MHz
$ z7 a4 H" q' C
1 J# N5 o5 U7 I1 `9 X注意:时钟频率过低会影响printf等函数的功能
( X( _: H2 N" l- b8 B
$ X' w1 g9 z* A9 i* x$ w
/ m# B! x. N7 a- z
" K+ ~. r' t" Q m: P4 y8 m6 S' _( `- v
4 [1 s( I& g* Z4 o; ]STM32的8通道ADC配置
& X1 }9 ?" t+ z6 i+ gSTM32Cube的ADC配置
: `( b- q: \& d8 K3 u, r; a9 B. Z+ o0 ]% V& H0 v$ G
5 f# P0 K0 ^" R& o. d1 A T
% l9 @ v$ e% {; w( \STM32Cube的DMA配置
/ r! I2 m& Y) E配置为DMA通道1" D2 u; d8 K5 m/ Q5 J4 T) W3 b
2 E p1 e9 z( o+ \% q
1 l' v8 I; O& Q8 H& k
. A% b6 e: Y& U0 @* a* S
设置DMA的循环搬运
' ~: Q; ~- M$ j! n# O2 W7 [0 k! V* O1 }6 E5 c8 C
5 Q% _8 N0 O3 c& G7 @# \2 v6 R7 Q, G/ z& ^/ C" O) @% G! A& [
开启DMA中断4 Q4 w C! Q; u
2 u# p* c/ q6 c! y) ?- L
/ I! E3 r$ B6 F2 p. a, @/ I
4 `/ n5 K3 D, Z& w
. }( i4 j& V8 N0 X( ^% j# kADC的DMA中断, m. q, ~ K" |/ n' r9 R( Q& {
DMA的中断服务函数可以通过以下方式寻找2 z& I4 \* L8 c i/ _
; z; ]- n- y* G7 U: N O# N5 F( l首先在.s启动文件中找到对应的中断服务函数
9 V1 m$ p/ R* R- E* N: [# }& d: D% E- Z" i* Q4 h- h
0 [4 b0 r: T' _9 E3 ]+ F
0 ^$ M! r. u' m# Z
可以看到,其调用了HAL_DMA_IRQHandler函数& I3 v2 V- x V0 U$ q: R
7 }1 f, K1 A/ O" Y- S6 H
. D6 `; c4 k" F2 L4 {, H7 G% j: B$ g; M* }3 o# X" ^. L& z
继续跳进去
1 d: L* r0 l) d' c) E- ?. ~+ C
: m; P+ A2 @0 j" v4 L5 [
2 i2 W$ l) v5 M& N5 B' x4 E4 V
/ B# \- a8 w- A7 ^, M5 L7 Z
" V- Y) ^ Q7 R) l6 G1 m; ]: k3 a( W: E
这里的XferCpltCallback是一个函数指针,我们看一下他的定义" u2 t9 P! A9 ^4 x$ f- d, h
! R" J" s: P$ \5 ?
. F# E) s( v6 A) y9 u3 L2 F6 `- g5 L) M- r$ ~5 G( A4 O; i" m j
这个函数指针成员到底指向了什么,你直接去追是追不到的,实际上在DMA启动之后会为这个成员赋值。
9 F9 ^5 j7 U+ P& l7 v$ y: M0 w
. l- v8 {8 D" ]9 e* M+ [4 ~这个赋值的操作是在HAL_ADC_Start_DMA函数中完成的
6 M# C# \- U8 c) [0 _7 Y4 Z1 ^ Q5 ?& z! H% \9 s3 u
1 h3 ?3 E& N8 ]2 H# |6 w1 d, q L) b
这个ADC_DMAConvCplt就是ADC DMA的回调函数) s6 v* A+ [" h' a: W6 s* [
* ]( E) n" h) u9 T3 C2 s
/ b/ M3 ?# o% L* o: M
* b% r: r9 c) b, c" [! g1 g
4 a. m0 h1 ~% Q8 P' [
7 G' T& Z; k0 W4 F' t' {
这个ADC_DMAConvCplt回调函数最终是调用这个, i9 y5 ]' {; C }3 I4 i+ `- |. D
! _$ q" M* a u B3 ]4 Q
' w" }9 ~8 g) C$ ?
, U/ U/ O* \( }/ d' z8 N, E8 e3 t6 L! q8 W
也就是这个HAL_ADC_ConvCpltCallback函数,这个中断处理函数是weak的,因此我们可以进行重写
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+ c8 P- J4 X& V0 ]1 a0 v 我们把这个函数在adc.c文件中重写一下
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8 o. R' C4 z; L4 c可以在里面关闭DMA,这样一次ADC转换DAM存放完成后就结束了# b9 ~# f' r5 F) v6 @( A5 F
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如果需要开始下一次,直接调用HAL_ADC_START x' w* s# ~+ ]3 m$ v
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